Patent US2640612A successfully refreshed from Google Patents.
US2640612A
Expired / Lapsed
US
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Portable hoist
Assignee: Individual
•
Filing: 1949-05-26
•
Granted: 1953-06-02
•
Expires: 1969-05-26
Abstract
No abstract record available.
Inventors
- 👤 Leonard D Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:23
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/44; B60P1/4414; B60P1/4421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1910364A
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US1917621A
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US1924751A
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US2151238A
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GB486962A
Cited
US2387693A
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US2521727A
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US2530341A
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US2456320A
Cited
US2514052A
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US2505009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |